Bosch Gen 4 free wheel

[Doddy]

Morning all.
I have a Bosch gen 4 motor , 1700 miles 2021, warranty has just run out and the free wheel is sometimes locked in, locked out, when you back rotate the pedals it is really lump, like the teeth in a standard hub, anyone else have a problem like this, is there a fix, heard spares are hard to come by, can anyone recommend a repair service.
Thanks Phil.

 

[Mikerb]

are you sure it is the motor and not your freehub?

 

[Zimmerframe]

when you back rotate the pedals it is really lump,

are you sure it is the motor and not your freehub?

Would suggest it's the motor ? not the hub ?

@Bearing Man

 

[Bearing Man]

Morning all.
I have a Bosch gen 4 motor , 1700 miles 2021, warranty has just run out and the free wheel is sometimes locked in, locked out, when you back rotate the pedals it is really lump, like the teeth in a standard hub, anyone else have a problem like this, is there a fix, heard spares are hard to come by, can anyone recommend a repair service.
Thanks Phil.

If the issue is with the freehub in the back wheel, the chain will go slack on top (provided you have a derailleur system) If this is not happening, then as the others have said, it is probably motor related. This is a common issue on the Gen 4 because the crankshaft rusts and starts to become tight in the freewheel sleeve within the motor.
To check this: Remove the chain, hold the front chainring and turn the pedals backwards. The crank should be relatively free moving and a clear crisp ratchet sound should be heard.

 

[yorkshire89]

Cranks on a Bosch gen 4 should spin backwards without moving the chainring/chain, so sounds motor related.

I'd take it to a Bosch service centre and let them send diagnostics off to Bosch. They might come good being just out of warranty...